Computer Simulation of Gold Code Phase Modulation in Ocean Acoustic Tomography

Abstract

This work investigates the viability of Gold code phase modulation in acoustic tomography, a technique for large scale measurement of ocean characteristics. Maximal-length sequences are currently used for modulation, requiring time division multiplexing of tomographic signals to avoid interference. The proposed alternative scheme of code division multiplexing Gold code modulated signals promises more rapid, simultaneous ocean projections. Computer simulation enables side-by-side comparison of the Gold code and maximal-length sequence modulating methods. Based on favorable results, a specific set of Gold codes is recommended for future use in a tomography experiments. Theses. (RH)

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1989
Accession Number
ADA218016

Entities

People

  • Peter J. Lynch

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Acoustic Tomography
  • Code Division Multiplexing
  • Computer Programs
  • Computer Simulations
  • Computers
  • Demodulators
  • Frequency
  • Frequency Response
  • Information Theory
  • Measurement
  • Modulation
  • Ocean Acoustic Tomography
  • Ocean Characteristics
  • Phase Modulation
  • Shift Registers
  • Signal Processing
  • Time Division Multiplexing

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Computational Modeling and Simulation
  • Optical Physics and Photonics.